//-----------------------------------------------------------------------------
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Low frequency Jablotron tag commands
// Differential Biphase, RF/64, 64 bits long (complete)
//-----------------------------------------------------------------------------
#include "cmdlfjablotron.h"
static int CmdHelp(const char *Cmd);
static int usage_lf_jablotron_clone(void) {
PrintAndLogEx(NORMAL, "clone a Jablotron tag to a T55x7 tag.");
PrintAndLogEx(NORMAL, "Usage: lf jablotron clone [h] <card ID> <Q5>");
PrintAndLogEx(NORMAL, "Options:");
PrintAndLogEx(NORMAL, " h : This help");
PrintAndLogEx(NORMAL, " <card ID> : jablotron card ID");
PrintAndLogEx(NORMAL, " <Q5> : specify write to Q5 (t5555 instead of t55x7)");
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(NORMAL, "Examples:");
PrintAndLogEx(NORMAL, " lf jablotron clone 112233");
return 0;
}
static int usage_lf_jablotron_sim(void) {
PrintAndLogEx(NORMAL, "Enables simulation of jablotron card with specified card number.");
PrintAndLogEx(NORMAL, "Simulation runs until the button is pressed or another USB command is issued.");
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(NORMAL, "Usage: lf jablotron sim [h] <card ID>");
PrintAndLogEx(NORMAL, "Options:");
PrintAndLogEx(NORMAL, " h : This help");
PrintAndLogEx(NORMAL, " <card ID> : jablotron card ID");
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(NORMAL, "Examples:");
PrintAndLogEx(NORMAL, " lf jablotron sim 112233");
return 0;
}
static uint8_t jablontron_chksum(uint8_t *bits) {
uint8_t chksum = 0;
for (int i = 16; i < 56; i += 8) {
chksum += bytebits_to_byte(bits + i, 8);
}
chksum ^= 0x3A;
return chksum;
}
int getJablotronBits(uint64_t fullcode, uint8_t *bits) {
//preamp
num_to_bytebits(0xFFFF, 16, bits);
//fullcode
num_to_bytebits(fullcode, 40, bits + 16);
//chksum byte
uint8_t chksum = jablontron_chksum(bits);
num_to_bytebits(chksum, 8, bits + 56);
return 1;
}
// ASK/Diphase fc/64 (inverted Biphase)
// Note: this is not a demod, this is only a detection
// the parameter *bits needs to be demoded before call
// 0xFFFF preamble, 64bits
int detectJablotron(uint8_t *bits, size_t *size) {
if (*size < 64 * 2) return -1; //make sure buffer has enough data
size_t startIdx = 0;
uint8_t preamble[] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0};
if (preambleSearch(bits, preamble, sizeof(preamble), size, &startIdx) == 0)
return -2; //preamble not found
if (*size != 64) return -3; // wrong demoded size
uint8_t checkchksum = jablontron_chksum(bits + startIdx);
uint8_t crc = bytebits_to_byte(bits + startIdx + 56, 8);
if (checkchksum != crc) return -5;
return (int)startIdx;
}
static uint64_t getJablontronCardId(uint64_t rawcode) {
uint64_t id = 0;
uint8_t bytes[] = {0, 0, 0, 0, 0};
num_to_bytes(rawcode, 5, bytes);
for (int i = 4, j = 0; i > -1; --i, j += 2) {
id += NIBBLE_LOW(bytes[i]) * (int)pow(10, j);
id += NIBBLE_HIGH(bytes[i]) * (int)pow(10, j + 1);
}
return id;
}
//see ASKDemod for what args are accepted
int CmdJablotronDemod(const char *Cmd) {
(void)Cmd; // Cmd is not used so far
//Differential Biphase / di-phase (inverted biphase)
//get binary from ask wave
if (!ASKbiphaseDemod("0 64 1 0", false)) {
if (g_debugMode) PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron ASKbiphaseDemod failed");
return 0;
}
size_t size = DemodBufferLen;
int ans = detectJablotron(DemodBuffer, &size);
if (ans < 0) {
if (g_debugMode) {
if (ans == -1)
PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron too few bits found");
else if (ans == -2)
PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron preamble not found");
else if (ans == -3)
PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron size not correct: %d", size);
else if (ans == -5)
PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron checksum failed");
else
PrintAndLogEx(DEBUG, "DEBUG: Error - Jablotron ans: %d", ans);
}
return 0;
}
setDemodBuff(DemodBuffer, 64, ans);
setClockGrid(g_DemodClock, g_DemodStartIdx + (ans * g_DemodClock));
//got a good demod
uint32_t raw1 = bytebits_to_byte(DemodBuffer, 32);
uint32_t raw2 = bytebits_to_byte(DemodBuffer + 32, 32);
uint64_t rawid = bytebits_to_byte(DemodBuffer + 16, 40);
uint64_t id = getJablontronCardId(rawid);
PrintAndLogEx(SUCCESS, "Jablotron Tag Found: Card ID: %"PRIx64" :: Raw: %08X%08X", id, raw1, raw2);
uint8_t chksum = raw2 & 0xFF;
PrintAndLogEx(INFO, "Checksum: %02X [%s]",
chksum,
(chksum == jablontron_chksum(DemodBuffer)) ? _GREEN_("OK") : _RED_("FAIL")
);
id = DEC2BCD(id);
// Printed format: 1410-nn-nnnn-nnnn
PrintAndLogEx(SUCCESS, "Printed: 1410-%02X-%04X-%04X",
(uint8_t)(id >> 32) & 0xFF,
(uint16_t)(id >> 16) & 0xFFFF,
(uint16_t)id & 0xFFFF
);
return 1;
}
int CmdJablotronRead(const char *Cmd) {
lf_read(true, 10000);
return CmdJablotronDemod(Cmd);
}
int CmdJablotronClone(const char *Cmd) {
uint64_t fullcode = 0;
uint32_t blocks[3] = {T55x7_MODULATION_DIPHASE | T55x7_BITRATE_RF_64 | 2 << T55x7_MAXBLOCK_SHIFT, 0, 0};
uint8_t bits[64];
memset(bits, 0, sizeof(bits));
char cmdp = tolower(param_getchar(Cmd, 0));
if (strlen(Cmd) == 0 || cmdp == 'h') return usage_lf_jablotron_clone();
fullcode = param_get64ex(Cmd, 0, 0, 16);
//Q5
if (param_getchar(Cmd, 1) == 'Q' || param_getchar(Cmd, 1) == 'q')
blocks[0] = T5555_MODULATION_BIPHASE | T5555_INVERT_OUTPUT | T5555_SET_BITRATE(64) | 2 << T5555_MAXBLOCK_SHIFT;
// clearing the topbit needed for the preambl detection.
if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
fullcode &= 0x7FFFFFFFFF;
PrintAndLogEx(INFO, "Card Number Truncated to 39bits: %"PRIx64, fullcode);
}
if (!getJablotronBits(fullcode, bits)) {
PrintAndLogEx(WARNING, "Error with tag bitstream generation.");
return 1;
}
blocks[1] = bytebits_to_byte(bits, 32);
blocks[2] = bytebits_to_byte(bits + 32, 32);
PrintAndLogEx(INFO, "Preparing to clone Jablotron to T55x7 with FullCode: %"PRIx64, fullcode);
print_blocks(blocks, 3);
UsbCommand resp;
UsbCommand c = {CMD_T55XX_WRITE_BLOCK, {0, 0, 0}};
for (uint8_t i = 0; i < 3; i++) {
c.arg[0] = blocks[i];
c.arg[1] = i;
clearCommandBuffer();
SendCommand(&c);
if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
return -1;
}
}
return 0;
}
int CmdJablotronSim(const char *Cmd) {
uint64_t fullcode = 0;
char cmdp = tolower(param_getchar(Cmd, 0));
if (strlen(Cmd) == 0 || cmdp == 'h') return usage_lf_jablotron_sim();
fullcode = param_get64ex(Cmd, 0, 0, 16);
// clearing the topbit needed for the preambl detection.
if ((fullcode & 0x7FFFFFFFFF) != fullcode) {
fullcode &= 0x7FFFFFFFFF;
PrintAndLogEx(INFO, "Card Number Truncated to 39bits: %"PRIx64, fullcode);
}
uint8_t clk = 64, encoding = 2, separator = 0, invert = 1;
uint16_t arg1, arg2;
size_t size = 64;
arg1 = clk << 8 | encoding;
arg2 = invert << 8 | separator;
PrintAndLogEx(SUCCESS, "Simulating Jablotron - FullCode: %"PRIx64, fullcode);
UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
getJablotronBits(fullcode, c.d.asBytes);
clearCommandBuffer();
SendCommand(&c);
return 0;
}
static command_t CommandTable[] = {
{"help", CmdHelp, 1, "This help"},
{"demod", CmdJablotronDemod, 1, "Demodulate an Jablotron tag from the GraphBuffer"},
{"read", CmdJablotronRead, 0, "Attempt to read and extract tag data from the antenna"},
{"clone", CmdJablotronClone, 0, "clone jablotron tag"},
{"sim", CmdJablotronSim, 0, "simulate jablotron tag"},
{NULL, NULL, 0, NULL}
};
int CmdLFJablotron(const char *Cmd) {
clearCommandBuffer();
CmdsParse(CommandTable, Cmd);
return 0;
}
int CmdHelp(const char *Cmd) {
(void)Cmd; // Cmd is not used so far
CmdsHelp(CommandTable);
return 0;
}